Hi guys, I am looking at a major renovation of a house in Sydney. I have engaged an architect as an initial sounding board and have done some initial look into what is are some possible improvements that will comply - (ie go up one story, add pool, new garage). Whilst there are a few options on what can be done - I need to have a ball park estimate on the cost to see if it is feasible (on budget and future returns). Whom can I get to estimate the construction costs of a few different options? Ie - cost to add 2 rooms upstairs is approx $400k, or cost to dig in a new garage under the house $200k etc. I need to get quoted on a few options then can set a firm budget for my architect and make a realistic goal on the improvements.